barnard



(No Model.) 3 Sheets-Sheet 1.

H. A. BARNARD.

ROLLER MILL.

No. 864,984. n atented June 14, 1887.

T'VITW'ESSES ROLLER MILL.

No. 364,984. Patented June 14, 1887.

J 7 f m 1 K} E." "I '1 Z M W 1' ZVVEJVTOR 1 I O Mwu g-@M 6 M?! a W 77! wOmey (No Model.) 3 Sheets-Sheet 3.

H. A. BARNARD.

ROLLER MILL.

No. 364,984. 02/ Patented June 14, 1887.

n Hill mm .of the roller-mill.

HEMAN A. BARNARD, OF MOLINE, ILLINOIS, ASSIGNOR TO THE BARNARD & LEASMANUFACTURING COMPANY.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 364,984, dated June 14,1887.

Application tiled .\pril 21, [886.

To all whom, it may concern.-

Be it known that I, IIEMAN A. BARNARD, of Moline, .in the county of RockIsland and State of Illinois, have invented certain new and usefulImprovements in Roller-Mills; and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, and to the letters of reference markedthereon, which form part ofthisspceitication,in which Figure 1represents an elevation of one side Fig. 2 is an elevation of theopposite side of the machine. Fig. 3 is an elevation of the side of themachine shown in Fig. l, but with the rollers, pulleys, andbelttightening mechanism reversed laterally. Fig. 4 is an elevation ofthe side of the machine opposite that shown in Fig. 3, with the rolls inthe same position. Fig. 5 is an end elevation of the machine. Fig. 6 isa plan view of the rolls and attachments. Fig. 7 is an end elevation ofa modification of the machine. Fig. 8 is a side elevation in detail ofthe bearings of the rolls.

The invention relates to improvements in roller-mills, and pertainsespecially to the beltdrive of the same.

The rolls are all constructed alike, are interchangeable, and the shaftofeach is extended at one end to receive a pulley. The rolls arearranged in pairs, and may have any kind of dress, preferably V-shaped,the members of each pair having the extended ends of the shafts andpulleys thereon on opposite sides of the machine. They are so placedupon the main frame of the machine that the extended end of the shaft ofthe fast-running roll of one pair and the similar end of the shaft ofthe slowrunning roll of the other pair are on the same side of themachine. The rolls of each pair turn toward each other, the material tobe ground passing between them. The bearings are all of equal size andsimilar, so that thejournals of each roll will fit in any of thebearings. An idler or tightening pulley is journaled in a detachableframe, that can be secured in corresponding positions to either leg onthe same side of the machine.

The objects of making the rolls interchangeable and thetightening-pulley reversible to either side of the main driving-belt isto adapt Serial No. 190.675. (No model.)

the mill to the motion of the driving-shaft when turning in eitherdirection.

Referring to the accompanying drawings, A designates the casing orhousing of the mill, having at top the hoppers (L a to feed the rolls,and supported by the heavy frame A, bolted through openings in lugs onthe end of itslegs to the floor, as shown in Figs. 1, 2, and 3.

The frame A is symmetrical, the ends having similar shapes, and in itsupper portion, where it connects with the casing A, are the bearings forthe rol'l-journals. The upper portion of the said casing or housing A isdetacL- ably secured to the frame A, so that it may be lifted therefromto interchange the rolls in their bearings.

B I3 and O C are the two pairs of rolls,having the extended ends oftheir shafts journaled in the bearing-blocks b b and c c, respectively.The long ends of the shafts of the rolls B B have secured upon them thepulleysDD, of unequal diameters, and the long ends of the shafts of therolls 0 C have secured upon them the pulleys E E, of diameters.respectively, equal to those of the pulleys D D. The pulleys D and E arerespectively larger than the pulleys D and E.

F F are pulleys of equal diameters, on the opposite ends of thetransverse counter-shaft f, journaledin thelowerpart ofthcmainframeA.

G is the main driving-belt, passing around the pulley G on theactuating-shaft g, situated below the tloor X, Fig. 1. The said beltpasses up through one of the openings at in the floor and over thepulley D, thence down under the pulley F, thence over the pulley E, andthence down through the other opening or to its starting-point from thepulley G.

H is a belt on the opposite side of the ma- 1 the rolls B 0, thusforming, with the latter, two pairs of grinding-rolls. If the driving Inconse- 9 keep the screw 13 and the frame I depressed,

.H taut.

shaft should have its motion reversed,'in order to prevent crossing thebelts, the casing A is detached and the roll B removed from its bearingsand placed in the bearings of the roll 0, the latter being placed in thebearings of the roll 13. The rolls B and C are similarly interchanged intheir bearings. This adapts the mill to the changed direction of motionof the main shaft and driving-belt, when the former has its rotationreversed.

Iis a rectangular frame, pivoted at one end to a pin or arm, i, standingout from the upper end of one leg of the frame A on the same side of thebelt H. The frame I surrounds the belt H, and has journaled transverselyupon it the idler-pulley I, hereinbefore referred to, and under whichthe said belt passes. The end of the frame I, opposite the pivoted end,has passing through a threaded opening in it the upper end of a verticaladjustingscrew, i, a proper nut being on said screw above the frame. Thesaid screw z" passes through-an opening in a lug, 6 standing out from anextension of the frameA, and has between the lower surface of said lugand its head i the coiled spring 13*, which tends to so that the idler 1will always keep the belt J is an arm pivoted at its lower end at aproper point on a boss, y, on one leg of the main frame, on the sameside as the belt G, and carrying an idler-pulley, J, with its shaftjournaled in the bifurcated upper end thereof.

j is a nut pivoted in an opening in the arm J below said bifurcation.

7c is a longitudinal rod passing through a lug, K, on the leg of themain frame A, on the same side but opposite end to that on which the armJ is attached. The inner end of the rod 7c is threaded, to engage thepivoted nut in the opening of the arm J. The said rod passes looselythrough the lug K, and has surrounding it, between said lug and its head70, the coiled spring 70 which tendsto force it outward and to draw theidler J against the belt-G,on which it rests, so as to keep the saidbelt suiiic'iently taut. The arm J is detachable from its boss'y, andcan 'be attached to a similar boss, g, on the opposite leg, but the sameside of the frame A, the same pin, y serving to attach it to each boss.The said pin passes through an opening in the enlarged end of the arm J,and enters the opening of either boss where it is secured. The rod is isalso reversible bypassing it through an open- 7 ing in a lug, K,carrespanding to the lug K,

and at a similar point on the opposite leg. The arm and rod are thusreversed when the rolls are interchanged in their bearings, as

described.

- Fig. 7 shows a modification of the belttightening devices, the arms Jin this case being pivoted upon the lower part of the main frame at thepoints 3 or 1 while the rod 70 is shorter and reversible, as before.This construction is used on machines in which it is not possible nordesirable to use the former modification.

Having described my invention, what I claim, and desire to secure byLetters Patent, is

1. In a four-roller mill, the combination; with the interchangeablerolls provided with pulleys,ofa main driving-shaft having a pulley 7thereon, a counter-shaft having a pulley on each end, a maindriving-belt communicating power from said shaft to the pulleys on oneroll of each pair on the same side of the ma chine and to saidcounter-shaft, a belt on the opposite side of the machine transmittingmotion from the counter-shaft to the remaining rolls of the machine, abelt-tightening device,- and an adjustable and'detachable frametherefor, all constructed and arranged to operate substantially as andfor the purpose set forth.

2. A roller-mill comprising the following instrumentalities: main frameA, provided with devices for'supporting a belt-tightening frame on eachside of the main drivingbelt, o

bearing-blocks b bc c, interchangeable rolls B B G G, pulleys D D E EFF, countershaftf, main driving-belt G, and belt-tightening pulley J forsaid belt, a detachable and adjustable frame for said pulley, and short5 1) b c c, interchangeable rolls B B O O, coun- 10.0

fer-shaft f, pulleys D D, E E, and F F, belts G H, idler-pulley I, frameI, adjust-ingrodsi 7c, tightening-pulley J, and detachablypivoted arm J,all constructed and arranged to operate substantially as and for thepurpose set forth.

In testimony thatIclaim the foregoing as my own I affix my signature inpresence of two witnesses.

HEMAN A. BARNARD.

Witnesses:

J. S. LEAS, Geo. M. FARNUM.

